Hi Anxiousvalkyrie

I am sorry that you are struggling with anger and it is causing you sleep and anxiety problems. I always wanted a sister but I got an abusive brother instead. I can't imagine what it is like to have a twin sibling. I would talk to your sister about the things that are eating at you about her actions. I believe it is the only way that you can get your life back. Anger can be a good thing when in the right situation but if not used in the correct way, it can make us miserable and it can steal our happiness.

Whenever we have anger we must also have the wisdom to use it correctly. I was reading a book about this as I also have some anger issues that I need to work on.
In my case, the person that I am having a problem with is not in my life anymore. She is in your life and I know that you love her so if you can just talk with her and do it because you love yourself as well it might help. I wish you the best in this and let us know how it goes. I hope that you get some good sleep soon and that you are able to cope better with your anxiety. ((hugs))